Having a play around using ngrx with the effects module. I'm dispatching an action, doing some async stuff via an effect, then I'm dispatching a new action to update the state, then redirect. Here's a cut down version of what i'm doing:

@Injectable()
export class Effects {

  @Effect()
  start$: Observable<Action> = this.actions$
    .ofType('start')
    // omitted for brevity
    .concatMap(action => [
      new finishAction(action.payload),
      go(['/'])
    ])
    .catch((err) => {
      console.log('err', err);
      return Observable.empty();
    })

  constructor(private actions$: Actions) {
  }
}

This all works fine - when i dispatch a start action, this effect kicks in, dispatches a finish action, then redirects back to the root (via the go action which is imported from @ngrx/router-store.

How do I handle something failing in finishAction ? At the moment i get an error in the console and then go runs regardless.

Ideally i'd like to intercept this failure, and dispatch another action (so i can show a modal or something, but not do the redirect)